Power supply system

Abstract

A power supply system for a vehicle is provided which makes it easy to supply an ignition voltage to an electronic control unit by using a battery equalizer. The power supply system for a vehicle comprises: an electronic control unit; a battery unit supplying a battery voltage to the electronic control unit; and a battery equalizer supplying the battery voltage as an ignition voltage to the electronic control unit; wherein, the battery equalizer includes a transistor transmitting the battery voltage from the battery unit to the electronic control unit as the ignition voltage when the vehicle is ignited.

1 - 8 . (canceled) 
     
     
         9 . A power supply system for a vehicle, comprising:
 an electronic control unit;   a battery unit supplying a battery voltage to the electronic control unit; and   a battery equalizer supplying the battery voltage as an ignition voltage to the electronic control unit;   wherein, the battery equalizer includes a transistor transmitting the battery voltage from the battery unit to the electronic control unit as the ignition voltage when a vehicle ignition switch is turned on.   
     
     
         10 . The power supply. system of  claim 9 , wherein the transistor is a N-channel MOSFET. 
     
     
         11 . The power supply system of  claim 10 , wherein the transistor switches on when the vehicle ignition switch is turned on such that the battery voltage is transmitted to the electronic control unit as the ignition voltage. 
     
     
         12 . The power supply system of  claim 9 , wherein the battery unit comprises a plurality of batteries connected in series. 
     
     
         13 . The power supply system of  claim 12 , wherein the battery unit supplies one of the voltages of the plurality of batteries as the battery voltage. 
     
     
         14 . The power supply system of  claim 12 , wherein the transistor transmits one of the voltages of the plurality of batteries as the ignition voltage. 
     
     
         15 . The power supply system of  claim 9 , wherein the battery voltage and the ignition voltage are 12V. 
     
     
         16 . The power supply system of  claim 9 , wherein the transistor switches on when a difference in voltage between a gate and source of the transistor is over 3V.